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Issue 46, 2012
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Comparative studies of photochemical cross-linking methods for stabilizing the bulk hetero-junction morphology in polymer solar cells

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Abstract

We are here presenting a comparative study between four different types of functionalities for cross-linking. With relatively simple means bromine, azide, vinyl and oxetane could be incorporated into the side chains of the low band-gap polymer TQ1. Cross-linking of the polymers was achieved by UV-light illumination to give solvent resistant films and reduced phase separation and growth of PCBM crystallites in polymer:PCBM films. The stability of solar cells based on the cross-linked polymers was tested under various conditions. This study showed that cross-linking can improve morphological stability but that it has little influence on the photochemical stability which is also decisive for stable device operation under constant illumination conditions.

Graphical abstract: Comparative studies of photochemical cross-linking methods for stabilizing the bulk hetero-junction morphology in polymer solar cells

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Publication details

The article was received on 03 Jul 2012, accepted on 14 Aug 2012 and first published on 30 Aug 2012


Article type: Paper
DOI: 10.1039/C2JM34284G
J. Mater. Chem., 2012,22, 24417-24423

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    Comparative studies of photochemical cross-linking methods for stabilizing the bulk hetero-junction morphology in polymer solar cells

    J. E. Carlé, B. Andreasen, T. Tromholt, M. V. Madsen, K. Norrman, M. Jørgensen and F. C. Krebs, J. Mater. Chem., 2012, 22, 24417
    DOI: 10.1039/C2JM34284G

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